My car is STILL hesitating!...
#26
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Originally Posted by Archangels
i know it will sound stupid but regardless weither i use the S4 or S5 fuel rails, they will both fit the injectors the same?
with an S5 welding on the end wouldnt be hard at all, but how do i go abouts removing the factory FPR?
any further information about modifying the S4 rail or S5 rail?
oh god, i hate typing out the whole list...
Have you tested the fuel pump voltage yet?
#27
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ahh you'd slap me if you could, i havent checked the fuel pump voltage yet, i probably will tommorow, i was out racing the car tonight and it seems as if the hesitation has slowly gotten better....
although i have high RPM hesitation, i'm suspecting ignition break-up....
regardless, do you have a picture of an S5 fuel rail by any chance?, or would i basically hack off past the stock FPR and weither how short or long the rail was, just weld on an AN fitting for a fuel line?...
although i have high RPM hesitation, i'm suspecting ignition break-up....
regardless, do you have a picture of an S5 fuel rail by any chance?, or would i basically hack off past the stock FPR and weither how short or long the rail was, just weld on an AN fitting for a fuel line?...
#29
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Well, I had a hesitation problem. Turns out that the coolant line from the back of the water pump was leaking onto my LIM. Which destroyed my LIM gasket. When I took my LIM off, the gasket was very jacked up. So, maybe make sure all your intake gaskets are alright.
#30
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Make sure your ignition coils are grounded properly. Did you move a coil to make room for your FMIC? Is your fuel-filter good? AFM good? Are your injectors grounded properly, tight seal at the grommets? Good voltage to their plugs?
If you have a buddy with a wideband O2 sensor, you should try to borrow it--that way you can see if you're running rich/lean when these hesitations occur. Just another way to trouble-shoot.
Also, are you running STOCK NGK plug-wires?
If you have a buddy with a wideband O2 sensor, you should try to borrow it--that way you can see if you're running rich/lean when these hesitations occur. Just another way to trouble-shoot.
Also, are you running STOCK NGK plug-wires?
#31
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Originally Posted by NZConvertible
I thought AN fittings were aluminium. You'd have to weld a steel threaded boss to take an AN adaptor.
Do you need the expense of AN fittings and SS hoses?
Do you need the expense of AN fittings and SS hoses?
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Originally Posted by eriksseven
Make sure your ignition coils are grounded properly. Did you move a coil to make room for your FMIC? Is your fuel-filter good? AFM good? Are your injectors grounded properly, tight seal at the grommets? Good voltage to their plugs?
If you have a buddy with a wideband O2 sensor, you should try to borrow it--that way you can see if you're running rich/lean when these hesitations occur. Just another way to trouble-shoot.
Also, are you running STOCK NGK plug-wires?
If you have a buddy with a wideband O2 sensor, you should try to borrow it--that way you can see if you're running rich/lean when these hesitations occur. Just another way to trouble-shoot.
Also, are you running STOCK NGK plug-wires?
fuel filter is good, AFM i have no idea how to check that, injectors are grounded properly, and, how do i check the voltage to their plugs?...
#33
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Originally Posted by eriksseven
Are your injectors grounded properly...
Also, are you running STOCK NGK plug-wires?
Originally Posted by Archangels
ofcourse not, but if you could give me options for the S5 fuel rail i'll definitly do what you suggest...
i put grounding straps from each coil to the neg. on the battery, yes i moved one of the coils but it's grounded with a strap so it should be alright?...
AFM i have no idea how to check that...
injectors are grounded properly...
and, how do i check the voltage to their plugs?...
#34
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Ok all not to jack the thread...but on an s5 GTU with a stock setup where would you go to check why the car is hesitating... Here is what i've done so far...
Cleaned and sanded all grounds...
Checked MAF to make sure there are no leaks AFTER it...
Plug wires are new and plugs are good...
Cleaned and sanded all grounds...
Checked MAF to make sure there are no leaks AFTER it...
Plug wires are new and plugs are good...
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whoops, my bad, i meant that i grounded the injector harness, not the injectors themselves....
ok so weither rail i use, you say to use brass fittings?, what type of metal are used for each rail, being S4 and S5?, brass can be.... welded.... to it?...
and you say, there's no direct difference in size and/or flow between each rail?...
sorry if i'm repeating myself....
ok so weither rail i use, you say to use brass fittings?, what type of metal are used for each rail, being S4 and S5?, brass can be.... welded.... to it?...
and you say, there's no direct difference in size and/or flow between each rail?...
sorry if i'm repeating myself....
#36
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Originally Posted by Archangels
ok so weither rail i use, you say to use brass fittings?, what type of metal are used for each rail, being S4 and S5?, brass can be.... welded.... to it?
and you say, there's no direct difference in size and/or flow between each rail?
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i really hate to pester you, but you say i'm to screw a brass fitting onto the S4 fuel rail, what type of fitting do i use?...
do you have a somewhat step-by-step guide as to what i'm supposed to do and how i'm to make this work?...
i'm kind of in the dark here....
do you have a somewhat step-by-step guide as to what i'm supposed to do and how i'm to make this work?...
i'm kind of in the dark here....
#38
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I had the same hesitation, not in first gear (because it revved through the range too quickly) but in second gear. I found that the pulsation damper screw was backed out (my PD is now a banjo bolt.) After repairing that, the car runs like a top. I would almost certainly agree with the above theories of it being fuel-related.
#39
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Originally Posted by Archangels
i really hate to pester you, but you say i'm to screw a brass fitting onto the S4 fuel rail, what type of fitting do i use?
It'll look something like this (but these guys don'thave the right one):
http://www.fittingsandadapters.com/maleconnector1.html
Getting back to the actual problem, have you checked the fuel pump voltage yet?!
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Originally Posted by NZConvertible
A brass fitting with a thread on one side and a hose barb on the other. Take the rail and some 5/16" fuel hose to an engineering supply store and tell them you wan't to connect the hose to the rail. They'll give you the correct fitting.
It'll look something like this (but these guys don'thave the right one):
http://www.fittingsandadapters.com/maleconnector1.html
Getting back to the actual problem, have you checked the fuel pump voltage yet?!
It'll look something like this (but these guys don'thave the right one):
http://www.fittingsandadapters.com/maleconnector1.html
Getting back to the actual problem, have you checked the fuel pump voltage yet?!
it's been -10 or worse the past bit, i've neglected the car, infact, i havent even driven it....
#42
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Originally Posted by jamespond24
I'm having an exact hestiation with my 90 TII that's just been rebuilt.
#44
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is it a 6 port?? the actuators are supose to be activated by exhaust pressure, taking out the kats reduces back pressure. so you get a hesitation while the pressure builds to open the 5th and 6th ports... check them.
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so i installed my MSD6AL, gears 3rd 4th and 5th have lost most of the hesitation when i get on the gas, but 1st and 2nd are still horrible....
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Originally Posted by Wankel7
Did you check on the alternator as a source of interference with the wiring to the ecu?
just losen and take the belt off the alternator, or, unplug it?...
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Originally Posted by misterstyx69
you replaced the spark plugs yet?..and have you tried a Different AFM?,changing Fuel filter?
AFM?, no....
would it even make a difference?...
i get no hesitation in 4th and 5th now....